Tangled up in words.... the problem is the email notifications for *both* PM's and new posts. The PM's themselves are working ok, meaning that you can see them on the forum, under the "My Messages" tab, but you don't get the email notification. That's what I meant.
If you know somebody sent you one, but it doesn't show up under the "My Messages" tab, you can report that and REALLY confuse the issue!
But it looks like an email-sending problem, basically.
The weird thing is that most people don't get any emails, but a few do.
We're working on it....